Here is the full list of all 25 Simple Spy achievements.
Complete all 15 level in Fifth sector
Complete fifth sector bonus level
Finish any fifteen levels in 1 try
Finish any twenty levels in 1 try
Finish any ten levels in 1 try
Finish any five levels in 1 try
Complete fourth sector bonus level
Collect 60 keys
Complete all 15 level in fourth sector
Collect 50 keys
Complete third sector bonus level
Complete all 15 level in third sector
Collect 40 keys
Complete second sector bonus level
Collect 30 keys
Complete all 15 level in second sector
Collect 20 keys
Complete first sector bonus level
Complete all 15 level in first sector
Collect 10 keys
Reach 500 tries
Finish any three levels in 1 try
Collect 75 keys
Find and Reach the suicide point
Complete entire levels,collect all keys